Jeep Gladiator Bed Mat - $125
Condition: Like new
Make: Black Armour
Like new Black Armour bed mat fits all 2019-2024 Jeep Gladiators. Has been in covered bed. No marks? scratches, or dings.
Made of thick, grippy rubber, it protects, reduces bed noise and helps stop things from sliding around...
If you select using the top of your rack, I'd suggest 1) Pull the batteries. 2) Remove the wheels and mount to the axel locations on the bikes. That will get them a foot lower and pounds lighter.
I get 14-15 with my 2023 Mojave but I have a heavy foot (80-ish on the freeway). With a bed rack and gear that drops to the high 13's.
I believe that my milage may improve with regearing. It (my Mojave) really does not like that sweet (milage) spot at ~22,000 rpm.
Look into Desertdoesit Seat Jackers. They make a big difference on those long drives.
https://desertdoesit.com/products/2019-jeep-wrangle-jl-and-gladiator-front-seat-jackers
I'm a Diamondback guy. It is expensive, but if you have valuables or sensitive items in your truck, it is the way to go.
https://diamondbackcovers.com/products/diamondbackhd?variant=28732457161